OK I will it without D1/@2 and see if it worksHi,
I think even w/o D1/D2/D3 those led will lit on. Not like in the any inductor coil (relay) needs it .
very rare to experience a reverse voltage happened due to the supply is at dc level.
And also D3 is not a zener if the schematic is D3 label see the cathode ( / ) not like (z )look like.
Thanks for the video clips it seem good to me.